Process of removing chaff from coffee.



-M. H. GASSER.

PROCESS OF REHOVING CHAFF FROM COFFEE.

APPLICATION FILED JUNE 13, 1913.

1,09%,s31, Patented Apr. 14; mm

l P I I WITNESSES: INVENTOR; ,9. c. m (j & 7Z fiwm%&ww,

I the coffee seeds or berries, as they are more to the accompanying drawings, and to the chaff is nearly all, if not entirely, removed MILTON H. GASSER, 01F TULEDD, OHIO.

i ,oeassi.

specification of Letters Patent.

Patented Apr. 3 5i, dlg llidlm Application filed June 13, 1913. serial Tso. 77$,t27.

To all whom it may concern Be it known that I, MILTON. H. GASSER a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Process of Removing Chafi from Coffee; and I do hereby declare the following to he a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had characters of reference marked thereon, which form a part of this specification. 4

This invention relates particularly to the treatment of coflee, whereby what is commonly known as chaff is separated therefrom. This chaff is present in the form of a thin skin between inner and outer portions of each seed of the coffee berry, and its presence in ground coffee is ob ectionable for different reasons well understood in the trade.

Numerous attempts have been made to remove chafi' from coffee, and the method more commonly practised is to finely grind the coffee seeds and to then subject theground colfee to an air suction or draft to remove the light chaff particles therefrom. This method is objectionable, however, for the reason that the finely powdered particles of coflee are removed to a considerable extent with the chaff thereby entailing a very considerable loss of the coffee itself.

The object of my invention is the provision of a simple and improved process for trcatingor acting on coffee whereby the therefrom without any perceptible loss of the nutritious part of the coffee.

The invention is fully described in the following specification, and While, in its broader aspect, it is capable of being practised in numerous Ways, one method of carrying out the same is illustrated in the ac companying drawing.

In the practising of my improved process,

commonly called, are first coarsely broken in any suitable manner to loosen or free the chaff therefrom, and 'the broken coffee is then subjected to an air draft or suction, which draws the light chafi therefrom. Inasmuch as the breaking of the coffee Willi necessarily produce more or 'less dust-or" fine particles it is p1'eferahle,after breaking the coffee and before subjecting it to the air draft, to pass it over a shaker sieve, the mesh or perforations of which are of suit able size to permit the finely broken particles of coffee to pass therethrough, thus i "enh ing the passage of such small par ti es under the air draft and the consequent drawing of the same with the chaff from the broken coffee.

In the apparatus shown in the drawing for carrying out my process, 1, l designate crushing or breaking rolls between Whichthe codes is fed, such rolls heii itably spaced to cause a coarse brea coifee seeds or berries in their pa go therebetween. The coffee after bcinghroken is delivered by a trough or chute it onto a shaker-sieve 3, being distributed across the same in a more or less even sheet, such sieve being inclined to cause the coffee to gradually work down the same and to'fall there of the ing delivery trough l, which is movable with the sieve. The shaker mechanism is provided beneath the screen 3 with an iihperforate bottom portion 5, which is inclined toward the trough a to deliver to such trough the powdered or fine coffee which drops thereon through the screen. Across the delivery endoif'tne screen 3 is arranged a suction mouth-piece 6 connected with any suitable stiction means whereby the chad, as it passes under the mouth-piece with the cot? fee, is drawn upward from the cofi ee into the mouth piece and thence delivered to any suitable p int of discharge by the air draft. It is referable to provide the front and. rear moles of the mouthpiece 6 with gates or slides 7, which are adjustable to vary the space between the respective edges oi the mouth-piece and the adjacent portions of the sieve.

It is found in practice that by the use of my improved chaff remov' recess for coffee, the chafl is almost entirey removed from the coffee without anyrmeterial loss of the line articles of coffee, thus making; it of consi ereble value'for use in coffee grinding factories.

I Wish it understood that my invention not limited to any particular apparatus means for practising the same, or to all of the described details except in so far aseech limitations are specified in the chairs the i It? ti Tilt? carried downward by gravity and fall through space to remove the light chaff therefrom. y

In testimony whereof, I have hereunto 15 signed my name to this specification in the presence of two subscribing Witnesses.

MILTON H. GASSER.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is,- 1

The process of i-en'ioving chef? fiombrohen cofi'ee which consists in screening the fine EMLI'i'hEIQS of thecofiee from rhe coarse particles and the chaff and then subjecting the coarse particles and chzifii after screen- I out the fine particles to an upward dmYt Witnesses: ()filll while the coarse cofiee and chef are S. T. KLoTz, on the screen and the coarse pal-moles are F. E. AUL. 

